Automatic stoker.



UNITED sTAijEs li'lill N T OFFICE.

JOHN MILLER FLEMING, 0B OTTAWA, ONTARIO, CANADA.

AUTMATC STOKER.

Application filed November To all whom 'if may cwim:

lle 1t known that I3 Jour.' MILLER llxriw lino. cnnl Ur nther fiwl mi the mijn nl tinA www the prebsm'e ol thu boiler fall hiflnw :i gwn-n amount, and tu prnvichx means Im' iniiwlin:n mg au' to Unfrenffu hninLnnlwn.

incre-using the nlliizuncy of thvy fnul :unl an raming stmlni in the holler.

,lllese objects are ntteiiiml hy the inwhnnism hnicilmftur ihsviihfrl nim-u 'fully in (hh lull in thu ziccmnpnllying; .Hptuilii-.nlhin `anni ill-:1w ings.

In the drmvings, Figur@ l is 9 wrt nulli-'- tioii through :1n nrililnwy [miler minimi-ml with my ilnpinvnd zintmnnti nt'ulwr. ll" if is: ai. pvi'nlmrtive vivw of the t'ntl hin n Stoker. liig. 2l is :i :settion long tln: lin@I 2MB. Fi. Fig. l is a sectiffiial almnlhm illustrating the` forni of automatic l'lfgiih* ing nppzi'nlnni. Fig. 5 i9 :i swlinn ih (me 0l' th@ har; *20. lg. ,l n rieuigh'nul ww pzu'tinlly broken uwnly, tlnnngh thvI t-antlxirlY Vling member on the linfa l' vll Fig, l

In the drawings, ,like chnizntviu. nl nxfvi mice indicata miuruslpnnrling pints in mnh figura.

Rn'ft-,rring to the clinwings, A is ihn lmilni' of any Suitable 0r (lesimhl amish-fiction, nuluding a bridge wall l0, gratte hars ll dull ash pit 12.

While :my t 'pe of grate hars mighr hr employed that illnslrfzle herrin is, thoy fumi of hollow giunti lmr inventori hy nw nml num. fully set fnl-th sind eleciilml in :1n vin-liv? application, Sviizxl No. 30h62, {ilml Maly 2nd, 1908.

In accordance-with theinvention.ihngrntn haiti are contained in the Humour); nwnut'm'v P, which pmjecls forwardly 0i the lli-tint. nl' their holler and nimiedizitelv above thi iVV of the grate bar, a fixed nel linppe (l provided, the said hopper extending over Specioation ai' Letters Patent.

Patented Dec. 99, 1909.

E53. i998. Serial No. 483.383.

wihhtzintiallly hu with@ Harlan-0 if thv gruta hars, nhvlvhj thv lsinl ful from the Sizun@ muy ln) vwnly flist'iihnlnfl Nor the surface .nl 1ink gi-:niv lun-.Q :15 hmninnltwr ih-Hvi'iheil.

Thi humm' muy liv Hilpjlnrwl nlmn thc. nmwnijx 9m mi l in any suitable, innmwr, h; I?) mi tht` sith: of the sinne, i n hnppm' 'l'l'um thu tup Lt ,niliyY struc-ture. 'l'ln hrit'tmn nl t'hiinf= l nilli i plurality nf :nhiph-il in 1e-Vinit tln passage of living; l'nlmwl. in thv vinlnnllinhut.

luy 1| hinting if having twins- .inlihif zqwilsilw# lll llttiintn the n: iin-nmlvw wing lrimignl-.u' in r|1 -v1 wlihii 'will Ihn angular miga nplwi- Illini.

im. bnr *w ill lill) space above lne lire and will increase the efficiency of the fuel by promoting combus-V tion.

The movement or reciprocation of the controlling member is elected automatically by any suitable source of power. In the form I have illustrated bell crank levers 21 are pivote/d to brackets 22 on the outer side ot1 the masonry structure B having the arms 23 pivotall connected to projectlons 24 on the control ing member and having the opposite arms provided with a plurality of perforations 25, to which the end of a link bar 2G may be pivoted, the o posite end of said link bar beingconnecte to cranks 27 on the shaft 28 which is connected/by a suitable gear 29 with a driving shaft 30 which is driven through the medium tof a belt 31 and pulley il from a suitable source of power, such as a small reciprocating steam engme.

ally found adj aeent to each other and where this is so. the same shaft 28 may extend across all the boilers havingcranks 27 formed at intervals thereon, to which the link bars l are connected.

While the periods, during which the fuel shall be fed, may be regulated by hand, I`

prefer to use the automatic regulating device herein shown. This consists of a vertically disposed tluid cylinder E disposed within a bracket 44 connected by a pipe 33 with the top of the boiler and having its upper end closed by a piston 34 on a rod 35, the upper end et' the rod having a cord or chain Bti connected thereto, which cord or `eli-.tin is connected to a controlling device for the power driving mechanism and in torni illu trateil extends over a suitable pulley or pulleys 3T to the upper end of a lever Sie, which is centrally tulcrumcd to a fixed support 39 and has a lower bifurcated end lo adapted to engage the belt to shift the saine from the live pulley 4l tothe loose pul ley 2; provided on the same shaft. The piston rod 3.3 is normally retained in its lowermost position by means of weights 42 su ported on a rod 43 extending through t e bottom of the bracket 4.4 and connected to the bottom of the piston.

ln the operation ol the automatic regulat-A ing device, the steam under boiler pressure, normally maintains the piston 34 at a given position in the cylinder, in which position, arrording to the adjustment of the devine, the lever 38 will maintain the belt on the livr pulley. As soon as the pressure sinks below the determined amount, the piston under the influence of the weights 42, will move downwardly, and this, through the cord or chain 3G will tilt the lever 38 and move the belt from the loose pulley to the live pulley, causing the shaft 28 to rotate, which will reciprocate the bell crank 21,

I causing the controlling member D to reciprocate` and this will permit passage of the fuel whenever the opening in the connecting member registers` with those in the fuel hopper.

lhe advantage of having the bars on the rating smaller and closer together than hose on the grating 15 is that for given movement of the grating 20,:111 increased number of openings will be made, as compared with, gratings having bars of equal size and equally spaced apart. This incr lscd occurrences of the openings in gratin l5 produces a most desirable and eiliv `cient sprinklin e ect'not to be secured if thel upper and owqr bars were or4 equal dimenslons The rfa of movement of the controlling member may be regulated by adjusting the 'upward t ivoting point of the link bar 26 in the per orations 25. As the fapertures simultaneously open and only re- In practice, a battery of boilers are usu mainl open for the time it takes the controlling member to move the width of the openin the fuel, which is preferably, in a finely ivided state, falls evenly and uniformly over the whole of the ate surface and thus the hre is always maintained uniform and fine powdered' fuel can be burned to advantage. i

In order to get the greatest` ossible advantage from the heat of the nel, I provide a set of water coils F above the grate bars, these coils extendin over the top and 'down a distance at each side and being connected at one end with a -pipe 45leading to the upper part of the boiler and on the other end with a pipe 46 leading to the lower part of the boiler. In this Way, the cooler water from the lower art of the boiler is made to circulate throu the fire below t e same.

It will be observed that the automatic regulation of the feeding means may be adlusted to cause the device to feed whenever the pressure falls below n given amount b varying the weights 42. lt will be observe that as the fuel hopper is located above the fire it will be heated thereby and then the eiciency of the fuel will be increased by the prior heating as is well known. The results obtainable by mv advice equal those obtainable by hand firing whichit '1s recognized is ings shall be interpreted as illustrative andnot in a limiting sense.

What I claim as my invention 1s:-

1. In an automatic Stoker, the combination the pipe and be heated by with grate ba rs and niasonry structure su porting the sanie having an aperture iii t ie top thereof, of a fixed hopper, having apertures in the bottoni thereof. brackets bearing on the masonry strut-ture and supporting the hopper in position above the aperture in the said masonry strueture, a reeiproeative eontrolling member ysupported on the masonry strueture, and extending below the bottoni ot' the aperturet and having apertures therein adapted to register with those in the, hopper.

2. In an automatic stokei'. the roiiibiiiation with the usual grate bars and masonry struc ture surroundinay the 4same having an aperture in the top thereof. and parallel trat-ks embedded iii the masonry struetui'e at eat-h side of the aperture. ot' a lixetl hopper having apertures iii the bottoni thereof, liraekets' supporting the hopper from the masonry structure. and li i'eeiproeative itieniber loeatetl below the hopper havingifl apertures therein adapted to register with those in the hopper, and being provided with rollers1 adapted to engage tlitI traeks embedded iii the iiias'onry structure.

2i. In an automatic lstoker, the eonibination with the tire grate, of a hopper disposed over the same, having the bottom formed by a grating` a controlling member disposed below the grating and being forii'ied with a like grating liariiilglr the bars eloser together `than those in the grating,r on the hopper and nieans for reciprocating the controlling iiieiiiher.

L In an automatic st0ker,tlie combination with the tire grate, of a fuel hopper disposed over the saine having the bottoni foi-ined by an open ating, a control]ingynieniber having.r a grating thereon adapted to ahnt the grating` on the fuel hopper, the space between the bars on the hopper being a niultiple of the space between the bars on the controlling inenibe and means for reciprocating the controlling nieniber.

In an automatie Stoker, the combination with a `tire grate, of a t'uel hop er disposed above the same, a fuel control ing member at the bottoni of the fuel hopper, Said controlling member having an air conducting means which roniniunieates with the space above the tire lgrate and the open air whereby air may he introduced into the spare above the tire grate to promote eoinbustlon.

t. ln an automatic stoker. the combination with a tire grate, of a hopper disposed over the same. a controlling member disposed below the hop ier, said ineniber being formed with a plurality of hollow ha rs having downwardly discharging ports, adapted to condiiet a luid and discharge the saine over the grate.

T. In an automatic Stoker, the eoiiihination of a fixed fuel hopper having suitable side walls and a grating forming the hottoni, thereof, comprising spaced inverted bars V shaped in eroafs section, a reci irocating nieiiiber located below the fuel iopper formed with a grating comprising, bars, V- `shaped in cross section of -smaller dimensions and spaced apart a distance less than the space between the. bars of said hopper, and means for reciprocating the controlling i member.

In witness whereof I have hereunto set my hand in the presence of two witnesses. 

